examples: add SEND/RECV to lora at-cmd for LoRa P2P/P2MP (not LoRaWAN) testing

Signed-off-by: deadprogram <ron@hybridgroup.com>

examples/lora/atcmd/README.md

@@ -4,7 +4,7 @@
 $ tinygo monitor
 Connected to /dev/ttyACM0. Press Ctrl-C to exit.
 +AT: OK
-+VER: 0.0.1 sx127x v18
++VER: 0.0.1 (sx127x v18)
 ```
 
 # Building

examples/lora/atcmd/commands.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"encoding/hex"
 	"strings"
 )
 
@@ -329,6 +330,49 @@ func log(setting string) error {
 	return nil
 }
 
+func send(data string) error {
+	cmd := "SEND"
+	writeCommandOutput(cmd, "Start")
+
+	// remove leading/trailing quotes
+	data = strings.Trim(data, "\"'")
+
+	if err := radio.LoraTx([]byte(data), defaultTimeout); err != nil {
+		writeCommandOutput(cmd, err.Error())
+
+		return err
+	}
+
+	writeCommandOutput(cmd, "Done")
+	return nil
+}
+
+func sendhex(data string) error {
+	cmd := "SENDHEX"
+	writeCommandOutput(cmd, "Start")
+
+	// remove leading/trailing quotes
+	data = strings.Trim(data, "\"'")
+
+	// convert data from hex formatted string
+	data = strings.ReplaceAll(data, " ", "")
+	payload, err := hex.DecodeString(data)
+	if err != nil {
+		writeCommandOutput(cmd, err.Error())
+
+		return err
+	}
+
+	if err := radio.LoraTx(payload, defaultTimeout); err != nil {
+		writeCommandOutput(cmd, err.Error())
+
+		return err
+	}
+
+	writeCommandOutput(cmd, "Done")
+	return nil
+}
+
 func recv(setting string) error {
 	cmd := "RECV"
 

examples/lora/atcmd/parser.go

@@ -103,6 +103,10 @@ func parseCommand(cmd, args string) error {
 		recv(args)
 	case "RECVHEX":
 		recvhex(args)
+	case "SEND":
+		send(args)
+	case "SENDHEX":
+		sendhex(args)
 	default:
 		return errInvalidCommand
 	}

examples/lora/atcmd/sim.go

@@ -29,7 +29,7 @@ func (sr *SimLoraRadio) SetLoraCrc(enable bool)          {}
 func (sr *SimLoraRadio) SetLoraSpreadingFactor(sf uint8) {}
 
 func firmwareVersion() string {
-	return "Simulator " + currentVersion()
+	return "simulator " + currentVersion()
 }
 
 func lorarx() ([]byte, error) {

examples/lora/atcmd/wl55jc.go

@@ -0,0 +1,54 @@
+//go:build nucleowl55jc
+
+/*
+	Nucleo WL55JC1
+	RFSwitch
+
++-----------+---------+------------+------------+
+|           | FE_CTRL1 |  FE_CTRL2 |   FE_CTRL3 |
+|           |   (PC4)  |   (PC5)   |     (PC3)  |
++-----------+----------+-----------+------------+
+|  TX_HP    |   LOW    |   HIGH    |    HIGH    |
+|  TX_LP    |   HIGH   |   HIGH    |    HIGH    |
+|  RX       |   HIGH   |   LOW     |    HIGH    |
++-----------+----------+-----------+------------+
+*/
+package main
+
+import (
+	"machine"
+
+	"tinygo.org/x/drivers/sx126x"
+)
+
+type CustomSwitch struct {
+}
+
+func (s CustomSwitch) InitRFSwitch() {
+	machine.PC4.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.PC5.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.PC3.Configure(machine.PinConfig{Mode: machine.PinOutput})
+}
+
+func (s CustomSwitch) SetRfSwitchMode(mode int) error {
+	switch mode {
+
+	case sx126x.RFSWITCH_TX_HP:
+		machine.PC4.Set(false)
+		machine.PC5.Set(true)
+		machine.PC3.Set(true)
+
+	case sx126x.RFSWITCH_TX_LP:
+		machine.PC4.Set(true)
+		machine.PC5.Set(true)
+		machine.PC3.Set(true)
+
+	case sx126x.RFSWITCH_RX:
+		machine.PC4.Set(true)
+		machine.PC5.Set(false)
+		machine.PC3.Set(true)
+
+	}
+	return nil
+
+}